IB Psychology Topic Brain Development Revision Notes (SL/HL)

IB Psychology Topic Brain Development Revision Notes (SL/HL) | RevisionDojo

Written by official IB examiners

Neural development: How the brain gets organised and efficient

Synaptogenesis is the formation of new synaptic connections between neurons, most active in early childhood.
Synaptic pruning eliminates unused neural connections, allowing the brain to specialise and function more efficiently.
Myelination insulates axons with myelin sheaths, speeding up neural transmission from childhood through adolescence.

Common Mistake

Critical periods have hard deadlines after which recovery is difficult (e.g. binocular vision development).
Sensitive periods are optimal windows for development but learning can still occur outside them (e.g. language acquisition).
Students often conflate these terms; use them precisely in exam answers.

Critical and sensitive periods: Windows for optimal development

Critical periods are narrow developmental windows with hard cutoffs; missing them prevents normal development (binocular vision, language phoneme discrimination).
Sensitive periods are extended optimal windows when the brain is most responsive; development continues more slowly outside them (first language acquisition, attachment formation).

Note

Environmental enrichment during sensitive periods has lasting effects on neural architecture and cognitive capacity.
Deprivation during critical periods can cause irreversible deficits; deprivation during sensitive periods causes delays that may partially recover with intervention.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Neural development: How the brain gets organised and efficient

Synaptogenesis is the formation of new synaptic connections between neurons, most active in early childhood.
Synaptic pruning eliminates unused neural connections, allowing the brain to specialise and function more efficiently.
Myelination insulates axons with myelin sheaths, speeding up neural transmission from childhood through adolescence.

Common Mistake

Critical periods have hard deadlines after which recovery is difficult (e.g. binocular vision development).
Sensitive periods are optimal windows for development but learning can still occur outside them (e.g. language acquisition).
Students often conflate these terms; use them precisely in exam answers.

Critical and sensitive periods: Windows for optimal development

Critical periods are narrow developmental windows with hard cutoffs; missing them prevents normal development (binocular vision, language phoneme discrimination).
Sensitive periods are extended optimal windows when the brain is most responsive; development continues more slowly outside them (first language acquisition, attachment formation).

Note

Environmental enrichment during sensitive periods has lasting effects on neural architecture and cognitive capacity.
Deprivation during critical periods can cause irreversible deficits; deprivation during sensitive periods causes delays that may partially recover with intervention.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

Biological Approach4 subtopics

Cognitive Approach4 subtopics

Sociocultural Approach4 subtopics

Option 1: Abnormal Psychology3 subtopics

Option 2: Developmental Psychology3 subtopics

Option 3: Health Psychology3 subtopics

Option 4: Human Relationships3 subtopics

IB Psychology Brain Development Notes

Biological Approach4 subtopics

Cognitive Approach4 subtopics

Sociocultural Approach4 subtopics

Option 1: Abnormal Psychology3 subtopics

Option 2: Developmental Psychology3 subtopics

Option 3: Health Psychology3 subtopics

Option 4: Human Relationships3 subtopics

Neural development: How the brain gets organised and efficient

Critical and sensitive periods: Windows for optimal development

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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Neural development: How the brain gets organised and efficient

Critical and sensitive periods: Windows for optimal development

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account